Process of sterilizing water, &amp;c.



UNITED STATES PATENT OFFICE.

ROBERT CAMBIER, AUGUSTE TIXIER, AND CHARLES EMILE ADNET, or PARIS, FRANCE, ASSIGNORS TO sPECIAL PRODUCTS COMPANY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

Patented July 7, 1908.

Application filed. January 19, 1904. Serial No. 189,710.

To all whom it may concern:

Be it known that we, ROBERT OAMEIER, AUGUSTE TIXIER, and CHARLES EMILE ADNET, citizens of the Republic of France, and residents of 26 Rue Vauquelin, Paris, in the said Republic, chemists, have invented certain new and useful Improvements in Processes for sterilizing Water; and we do hereby declare the fol owing to be a full, clear, and exact descri tion of the invention, such as will enable ot ers skilled in the art to which it appertains to make and use the same.

This invention consists in a process for sterilizing liquids, particularly water, based on the use of barium manganate which is easil attackable by impurities "L. e. the steri ization has for its object to destroy or render harmless to the human Organism impurities consisting of organic compounds and micro-organisms that are contained in water or other liquids.

When aerated water containing impurities of harmful organic compounds or microorganisms or both is made to traverse a bed of barium manganate, whether alone or mixed with fine sand or other inert body such as ground or broken lass or porcelain, the man anate is attackeri during the pas sage of t e water, by the carbonic acid and the oxygen dissolved in the latter. The e nation for the reaction may be written as fdllowsz- 2BaMnO, CO O BaMn,,O BaCO,.

If, as a consequence of the conditions of aeration and the speed of filtration, the carbonic acid is in excess, barium bicarbonate is also formed in accordance with the equation:

Paco, CO,+ H,O BaH,,(CO,),. These reactions may be combined into a single equation 2BaMnO,+2CO,+O+I-I,O=

BaMn,,O BaH,(CO

If the water does not contain sulfates or only contains an insufficient quantity of them, it will retain traces of barium in solution due to the slight solubility of the barium manganate; these may be easily eliminated by adding'feeble traces of any sulfate, natural strontium sulfate, for example, either to the water before or after its passage throu h the manganate, or to the latter. By this procedure the barium is completely recipitated and the water issues from the ter rose colored by traces of the permananate of' the base whose sulfate was used or eliminating the barium. These reactions occur in the bed of barium manganate in the conditions of the special mass; the water which runs rose colored from the filter is perfectly sterile and deprived of organic matter.

It is essential, in order to procure sterilization, that the water should be acid; if it does not contain sufficient carbonic acid either free or as bicarbonate, it issues colorless and is not sterile. TO-remedy this it sufiices to add to the water before it passes through the filter of barium manganate, traces of mineral acid, (sulfuric, nitric, hydrochloric, hosphoric, carbonic, etc.) The rose co ored, sterilized water thus'obtained may be used directly for a number of purposes, such as Washing, dressing Wounds, the needs of hygiene, fermentation industries, etc., but it is not suited for drinking because of the special flavor that the traces of the permanganate which it contains impart to it When necessary, it is easy to remove this flavor by adding to the rose colored water a trace of an reducing agent, such as ferrous sulfate, b1

suliite, etc., which will eliminate at the same time the barium, and then filtering the water. To the same end the water may be filtered through abed of some reducing agent, such as old iron, spathic iron ore, etc. using an appropriate a paratus.

Having thus escribed the nature of our said invention and the best means We know of carrying the same into practical effect, We claim 1. The process of sterilizin water containing-an acid and containing armful organic impurities or micro-or anisms, com rising the passing of the liqui through a be composed of barium manganate.

2. The process of sterilizin water containing an acid and containing armful organic impurities or micro-organisms, comprisin the addition of a sulfate to the liquid an filterin through a bed of barium manganate.

3. T e rocess of sterilizing water containing harm 1 organic impurities or microorganisms, comprisin the addition of a min- In testimony that we claim the foregoing eral acid and a sul ate to the liquid and as our invention, we have signed our names filtering through a bed of barium manganate. in presence of two subscribing witnesses.

4. The process of sterilizing water contain- ROBERT OAMBIER 5 ing harmful organic impurities or micro- AUGUSTE TIXIER organisms, comprising the-additionof a mineral acid and 'a sulfate to the liquid, filter CHARLES EMILE ADNET ing through a bed of barium manganate and Witnesses: finally acting on the filtrate with a reducing HANSON C. 00x12, 10 agent; ALoIDE FABE. 

